Toothbrush



FIG. 1 is a top plan view of a toothbrush showing our new design;

FIG. 2 is a right side elevation thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left side elevation thereof;

FIG. 5 is an end elevation as seen from the top of FIG. 1; and

FIG. 6 is an end elevation as seen from the bottom thereof. 

The ornamental design for a toothbrush, as shown and described. 